About LIBERTY™ Self‑Adhering Cap Sheet

LIBERTY™ SBS Self-Adhering Roofing Systems are applied without torches, open flames, or hot asphalt, and are suitable for many primed substrates. LIBERTY™ Self-Adhering Cap Sheet is an SBS modified granule-surfaced roofing membrane designed for use with LIBERTY™ Self-Adhering Base/Ply Sheet that helps provide durable protection on low-slope areas of your property, including porches, garages, carports, and sheds.

  • Self-adhering installation eliminates open flames, hot asphalt on your roof
  • No need for torches, kettles, or other bulky equipment
  • Reinforced construction with polyester mat coated with polymer-modified asphalt
  • Minimal set-up and clean-up time helps to speed up installation as compared with typical mopped SBS roofing systems
  • Installed with LIBERTY™ Self-Adhering Base/Ply Sheet as part of the LIBERTY™ SBS Self-Adhering Roofing System
  • Up to a 20-year limited warranty against manufacturing defects, depending on system1
  • 2-Ply LIBERTY™ SBS Self-Adhering Roofing System passes UL 2218A Class 4 impact-resistance testing


Note: Color swatches are for reference only. Always review actual product with shingles to ensure acceptable complementary match before installation on the roof.

This product can be used to comply with certain FORTIFIED Roof™ requirements. Visit gaf.com/fortified and current FORTIFIED Home™ Standard available at fortifiedhome.org for details. Applicable in the U.S. only.

Key Benefits

Granule-surfaced roofing membrane providing durable protection for residential low-slope areas

1See Limited Warranty on LIBERTY™ SBS Self-Adhering Materials for complete coverage and restrictions.
2LIBERTY™ SBS Self-Adhering Roof System may be appropriate for roof sizes at or below 2,500 square feet.

The LIBERTY™ SBS self-adhering roll roofing system

This LIBERTY™ roofing system from GAF not only simplifies installation with convenient peel-and-stick components, it’s also available in nine popular colors to complement your Timberline® or other GAF asphalt shingles.

GAF LIBERTY™ product warranty

When installed as a complete system, our LIBERTY™ Limited Warranty covers up to twenty years of manufacturing defects available on select systems.* System guarantees covering material defects and workmanship errors are also available for purchase for approved systems installed by GAF certified contractors.**
*Exclusions apply. See Limited Warranty on LIBERTY ™ SBS Self-Adhering Materials for complete coverage and restrictions.
**See Low-Slope Addendum to the System Plus Limited Warranty, Low-Slope Addendum to the Silver Pledge ™ Limited Warranty, and Low-Slope Addendum to the Golden Pledge® Limited Warranty for complete coverage and limitations
Thumbnail of video showing GAF LIBERTY™ Self-Adhering Roofing System step by step

LIBERTY™ step-by-step installation video

Step-by-step instructions show you how to install a LIBERTY™ low-slope roofing system.

LIBERTY™ SBS Self-Adhering 2-Ply Roofing System Installation — Step-by-step***

  1. GAF roof contractor repairing damage

    Step 1

    Inspect the roof, and repair or replace damaged areas.
  2. GAF roofing contractors rolling on LIBERTY Asphalt Primer.

    Step 2

    Apply LIBERTY™ Asphalt Primer at a rate of a 1/2 gallon per 100 sq. ft.
  3. GAF contractors installing LIBERTY SBS Self-Adhering Base/Ply on flat roof.

    Step 3

    Install LIBERTY™ Self-Adhering Base/Ply.
  4. Contractor applying LIBERTY Flashing Cement on exposed roof flange.

    Step 4

    Install edge flashing at all eave and rake edges, and apply LIBERTY™ Flashing Cement on exposed flange.
  5. GAF roofing contractors installing LIBERTY SBS Self-Adhering Cap Sheet on a flat roof.

    Step 5

    Install LIBERTY™ Self-Adhering Cap Sheet.

  6. Step 6

    Apply LIBERTY™ Flashing Cement on end laps, on exposed sheet and set the overlap back into place when applicable.
  7. Finished flat residential roof with GAF LIBERTY system.

    Step 7

    Clean up by removing tools, unused materials, and other debris. Plan on inspecting roof annually if possible.

***See application instructions for complete details. 

Product Documentation

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